/* Cognitive Biases for Designers — shared styles */

/* ==================================================
   Design Tokens
   ================================================== */
:root {
  /* Colours: foundation */
  --color-surface-page: #F0EBDF;
  --color-surface-muted: #E6E0CF;
  --color-surface-raised: #FAF6EC;
  --color-text-primary: #141414;
  --color-text-secondary: #494846;
  --color-text-subtle: #76746E;
  --color-border-default: #161616;
  --color-border-muted: #1414141a;
  --color-surface-inverse: #141414;
  --color-text-inverse: #EDE7D8;
  --color-text-inverse-muted: rgba(237, 231, 216, 0.72);
  --color-text-inverse-subtle: rgba(237, 231, 216, 0.55);
  --color-border-inverse: rgba(237, 231, 216, 0.12);
  --color-white: #FFFFFF;
  --color-black: #000000;

  /* Category accents: these four control bias category colours site-wide */
  --color-category-filter: #E63E2D;
  --color-category-connect: #2148CB;
  --color-category-decide: #E9B824;
  --color-category-recall: #2D6A4F;

  /* Typography */
  --font-family-base: "Space Grotesk", system-ui, sans-serif;
  --font-family-heading: "Space Grotesk", system-ui, sans-serif;
  --font-family-serif: "Instrument Serif", "Times New Roman", serif;
  --font-family-mono: "JetBrains Mono", ui-monospace, monospace;
  --font-size-body: 17px;
  --font-size-small: 11px;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --line-height-body: 1.55;

  /* Layout */
  --width-max: 1320px;
  --space-gutter: clamp(20px, 4vw, 56px);
  /* Responsive: mobile ≤880px · desktop >880px (see Mobile section at end of file) */

  /* Backwards-compatible aliases (existing selectors rely on these names) */
  --surface: var(--color-surface-page);
  --surface-muted: var(--color-surface-muted);
  --surface-raised: var(--color-surface-raised);
  --text: var(--color-text-primary);
  --text-link: color-mix(in oklab, var(--color-text-primary) 78%, var(--color-black));
  --text-muted: var(--color-text-secondary);
  --text-subtle: var(--color-text-subtle);
  --border: var(--color-border-default);
  --border-muted: var(--color-border-muted);
  --accent-tmi: var(--color-category-filter);
  --accent-nem: var(--color-category-connect);
  --accent-ntaf: var(--color-category-decide);
  --accent-wswr: var(--color-category-recall);
  --surface-inverse: var(--color-surface-inverse);
  --text-inverse: var(--color-text-inverse);
  --text-inverse-muted: var(--color-text-inverse-muted);
  --text-inverse-subtle: var(--color-text-inverse-subtle);
  --border-inverse: var(--color-border-inverse);
  --font-sans: var(--font-family-base);
  --font-serif: var(--font-family-serif);
  --font-mono: var(--font-family-mono);
}

[data-theme="dark"] {
  --surface: #131211;
  --surface-muted: #1E1D1B;
  --surface-raised: #0C0B0A;
  --text: #EDE7D8;
  --text-link: color-mix(in oklab, #EDE7D8 88%, var(--color-white));
  --text-muted: #B5B0A3;
  --text-subtle: #8A857A;
  --border: #EDE7D8;
  --border-muted: #EDE7D81f;

  --accent-tmi: #FF6F60;
  --accent-nem: #7C92F0;
  --accent-ntaf: #FFD45E;
  --accent-wswr: #6FB28F;

  --color-category-filter: #FF6F60;
  --color-category-connect: #7C92F0;
  --color-category-decide: #FFD45E;
  --color-category-recall: #6FB28F;
}

/* Category context: set --cat-* on any [data-cat] block */
[data-cat="tmi"],
.problem-card--tmi,
.pill[data-cat="too-much-information"],
.bias-card[data-cat="too-much-information"],
.bias-list__row[data-cat="too-much-information"] {
  --cat: var(--accent-tmi);
  --cat-bold: #C53C3C;
  --cat-muted: color-mix(in oklab, var(--accent-tmi) 14%, var(--surface));
  --cat-on: var(--color-white);
  --cat-on-soft: rgba(255, 255, 255, 0.78);
  --cat-rule: rgba(255, 255, 255, 0.28);
}

[data-cat="nem"],
.problem-card--nem,
.pill[data-cat="not-enough-meaning"],
.bias-card[data-cat="not-enough-meaning"],
.bias-list__row[data-cat="not-enough-meaning"] {
  --cat: var(--accent-nem);
  --cat-bold: #2148CB;
  --cat-muted: color-mix(in oklab, var(--accent-nem) 14%, var(--surface));
  --cat-on: var(--color-white);
  --cat-on-soft: rgba(255, 255, 255, 0.78);
  --cat-rule: rgba(255, 255, 255, 0.28);
}

[data-cat="ntaf"],
.problem-card--ntaf,
.pill[data-cat="need-to-act-fast"],
.bias-card[data-cat="need-to-act-fast"],
.bias-list__row[data-cat="need-to-act-fast"] {
  --cat: var(--accent-ntaf);
  --cat-bold: #E9B824;
  --cat-muted: color-mix(in oklab, var(--accent-ntaf) 18%, var(--surface));
  --cat-on: #1A1305;
  --cat-on-soft: rgba(26, 19, 5, 0.65);
  --cat-rule: rgba(26, 19, 5, 0.22);
  --cat-ink: #A6610A;
}

[data-cat="wswr"],
.problem-card--wswr,
.pill[data-cat="what-should-we-remember"],
.bias-card[data-cat="what-should-we-remember"],
.bias-list__row[data-cat="what-should-we-remember"] {
  --cat: var(--accent-wswr);
  --cat-bold: #2D6A4F;
  --cat-muted: color-mix(in oklab, var(--accent-wswr) 14%, var(--surface));
  --cat-on: var(--color-white);
  --cat-on-soft: rgba(255, 255, 255, 0.78);
  --cat-rule: rgba(255, 255, 255, 0.28);
}

[data-theme="dark"] .badge--ntaf { color: var(--accent-ntaf); }

/* ----- Reset ----- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; overflow-x: clip; }
body {
  margin: 0;
  background: var(--surface);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: var(--font-size-body);
  line-height: var(--line-height-body);
  font-weight: var(--font-weight-regular);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "ss01", "ss02";
  transition: background-color .2s ease, color .2s ease;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; border: 0; background: none; cursor: pointer; }
input, textarea { font: inherit; color: inherit; }
::selection { background: var(--text); color: var(--surface); }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
}

/* Skip link (WCAG bypass block) */
.skip-link {
  position: absolute;
  left: var(--space-gutter);
  top: -100%;
  z-index: 200;
  padding: 10px 16px;
  background: var(--text);
  color: var(--surface);
  font-size: 14px;
  font-weight: 500;
  border-radius: 8px;
  transition: top .15s ease;
}
.skip-link:focus,
.skip-link:focus-visible {
  top: 12px;
  outline: 3px solid var(--border-muted);
  outline-offset: 2px;
}

/* Visible keyboard focus (controls with custom focus styles excluded below) */
a:focus-visible,
button:focus-visible,
input:focus-visible,
[role="button"]:focus-visible,
[tabindex="0"]:focus-visible {
  outline: 3px solid var(--text);
  outline-offset: 2px;
}

/* ----- Layout ----- */
.wrap { max-width: var(--width-max); margin: 0 auto; padding-left: var(--space-gutter); padding-right: var(--space-gutter); }
.rule { border: 0; border-top: 1px solid var(--border); margin: 0; }
.rule--soft { border-top: 1px solid var(--border-muted); }

/* ----- Header ----- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  transition: background-color .25s ease, border-color .25s ease, backdrop-filter .25s ease;
}
.site-header.is-scrolled {
  background: color-mix(in oklab, var(--surface) 62%, transparent);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  backdrop-filter: blur(16px) saturate(160%);
  border-bottom-color: var(--border-muted);
}
[data-theme="dark"] .site-header.is-scrolled {
  background: color-mix(in oklab, var(--surface) 55%, transparent);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.logo {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 17px;
  letter-spacing: -0.01em;
  min-width: 0;
}
.logo__mark { flex-shrink: 0; }
.logo__text-wrap {
  min-width: 0;
  overflow: hidden;
}
.logo__text { display: block; }
.logo__text-track {
  display: inline-flex;
  width: max-content;
  white-space: nowrap;
}
.logo__text-segment {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}
.logo__text-sep {
  opacity: 0.45;
  padding: 0 0.35em;
}
.logo:not(.is-marquee) .logo__text-segment + .logo__text-segment { display: none; }
.logo:not(.is-marquee) .logo__text-sep { display: none; }
.logo__mark {
  width: 26px; height: 26px;
  display: grid; grid-template-columns: 1fr 1fr; grid-template-rows: 1fr 1fr; gap: 2px;
}
.logo__mark span { background: var(--text); }
.logo__mark span:nth-child(1) { background: var(--accent-tmi); }
.logo__mark span:nth-child(2) { background: var(--accent-nem); }
.logo__mark span:nth-child(3) { background: var(--accent-ntaf); }
.logo__mark span:nth-child(4) { background: var(--accent-wswr); }
.logo small { font-family: var(--font-mono); font-size: 11px; color: var(--text-subtle); letter-spacing: 0; font-weight: 400; }

@keyframes logo-text-marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.primary-nav { display: flex; gap: 28px; align-items: center; margin-left: auto; }
.primary-nav a { font-size: 15px; font-weight: 500; padding: 6px 2px; position: relative; }
.primary-nav a[aria-current="page"]::after,
.primary-nav a:hover::after { content: ""; position: absolute; left: 0; right: 0; bottom: -2px; height: 2px; background: var(--text); }

.header-tools { display: flex; align-items: center; gap: 12px; margin-left: 32px; flex-shrink: 0; }
.header-icon-btn {
  width: 36px; height: 36px; border: 1px solid var(--border); border-radius: 999px;
  display: inline-grid; place-items: center; transition: background .15s;
  color: var(--text); background: transparent; padding: 0; cursor: pointer;
}
.header-icon-btn:hover { background: var(--surface-muted); }
.header-icon-btn svg { width: 16px; height: 16px; }
.theme-toggle .sun { display: none; }
[data-theme="dark"] .theme-toggle .sun { display: block; }
[data-theme="dark"] .theme-toggle .moon { display: none; }

/* Bookmark save modal */
.bookmark-modal {
  position: fixed; inset: 0; z-index: 110;
  display: grid; place-items: center;
  padding: var(--space-gutter);
  opacity: 0; visibility: hidden;
  transition: opacity .2s ease, visibility .2s ease;
}
.bookmark-modal.is-open {
  opacity: 1; visibility: visible;
}
.bookmark-modal__backdrop {
  position: absolute; inset: 0;
  background: color-mix(in oklab, var(--text) 35%, transparent);
}
.bookmark-modal__panel {
  position: relative; z-index: 1;
  width: min(100%, 560px); max-height: min(88vh, 720px);
  overflow: auto;
  background: var(--surface-raised);
  border: 1px solid var(--border-muted);
  border-radius: 14px;
  padding: 28px 28px 24px;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.18);
}
.bookmark-modal__head {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: 16px; margin-bottom: 12px;
}
.bookmark-modal__head h2 {
  font-family: var(--font-sans); font-weight: 500;
  font-size: clamp(22px, 2.4vw, 28px); letter-spacing: -0.02em;
  line-height: 1.1; margin: 0;
}
.bookmark-modal__close { flex-shrink: 0; }
.bookmark-modal__lede {
  color: var(--text-muted); font-size: 15px; line-height: 1.5;
  margin: 0 0 20px; max-width: 48ch;
}
.bookmark-modal__sections {
  display: flex; flex-direction: column; gap: 18px;
}
.bookmark-modal__sections section {
  padding-top: 18px; border-top: 1px solid var(--border-muted);
}
.bookmark-modal__sections section:first-child { padding-top: 0; border-top: 0; }
.bookmark-modal__sections h3 {
  font-family: var(--font-sans); font-weight: 500; font-size: 15px;
  margin: 0 0 10px; letter-spacing: -0.01em;
}
.bookmark-modal__sections ul {
  margin: 0; padding: 0; list-style: none;
}
.bookmark-modal__sections li {
  position: relative; padding: 6px 0 6px 18px;
  font-size: 14.5px; line-height: 1.5; color: var(--text-muted);
}
.bookmark-modal__sections li::before {
  content: ""; position: absolute; left: 0; top: 14px;
  width: 8px; height: 1px; background: var(--text);
}
.bookmark-modal__sections kbd {
  font-family: var(--font-mono); font-size: 11px;
  padding: 2px 6px; border-radius: 4px;
  border: 1px solid var(--border-muted);
  background: var(--surface-muted);
  color: var(--text);
}
.bookmark-modal__note {
  margin: 20px 0 0; padding-top: 16px;
  border-top: 1px solid var(--border-muted);
  font-size: 13px; line-height: 1.5; color: var(--text-subtle);
}

.hamburger { display: none; width: 36px; height: 36px; border: 1px solid var(--border); border-radius: 999px; padding: 0; color: var(--text); }
.hamburger svg { width: 20px; height: 20px; display: block; }

/* Mobile drawer */
.drawer {
  position: fixed; inset: 0; z-index: 100; background: var(--surface);
  transform: translateX(100%); transition: transform .3s ease;
  display: flex; flex-direction: column; padding: 24px var(--space-gutter);
}
.drawer.open { transform: translateX(0); }
.drawer__top { display: flex; justify-content: space-between; align-items: center; height: 40px; }
.drawer__close { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.04em; }
.drawer__links { display: flex; flex-direction: column; gap: 6px; margin-top: 48px; }
.drawer__links a {
  font-family: var(--font-sans); font-weight: 500; font-size: 32px; letter-spacing: -0.02em;
  padding: 12px 0; border-bottom: 1px solid var(--border-muted);
}

/* ----- Buttons ----- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  height: 44px; padding: 0 22px;
  border-radius: 8px;
  font-family: var(--font-sans); font-weight: 500; font-size: 15px;
  border: 1px solid var(--border);
  background: var(--surface);
  transition: transform .15s ease, background .15s ease, color .15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn--solid { background: var(--text); color: var(--surface); }
.btn--solid:hover { background: var(--text-muted); }
.btn .arr { transition: transform .15s ease; }
.btn:hover .arr { transform: translateX(3px); }

/* ----- Eyebrows + Section headers ----- */
.eyebrow {
  font-family: var(--font-mono); font-size: 11.5px;
  text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--text-muted);
  display: inline-flex; align-items: center; gap: 8px;
}
.eyebrow::before { content: ""; width: 18px; height: 1px; background: var(--text-muted); display: inline-block; }

.section-head {
  display: flex; align-items: end; justify-content: space-between;
  margin-bottom: 36px; gap: 32px; flex-wrap: wrap;
}
.section-head h2 {
  font-family: var(--font-sans); font-weight: 500;
  font-size: clamp(32px, 4vw, 52px); line-height: 1.02; letter-spacing: -0.025em;
  margin: 0;
}
.section-head h2 em { font-family: var(--font-serif); font-style: italic; font-weight: 400; letter-spacing: -0.01em; }
.section-head p { color: var(--text-muted); max-width: 36ch; margin: 0; }

/* ----- Category badge ----- */
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 15px;
  text-transform: uppercase; letter-spacing: 0.1em;
  padding: 7px 15px 7px 12px;
  border: 1px solid currentColor;
  border-radius: 999px;
  line-height: 1.2;
}
.badge .dot { width: 8px; height: 8px; border-radius: 50%; background: currentColor; }
.badge--tmi { color: var(--cat, var(--accent-tmi)); }
.badge--nem { color: var(--cat, var(--accent-nem)); }
.badge--ntaf { color: var(--cat-ink, var(--cat, var(--accent-ntaf))); }
.badge--wswr { color: var(--cat, var(--accent-wswr)); }

[data-theme="dark"] .badge--ntaf { color: var(--accent-ntaf); }

/* ----- Hero (homepage) ----- */
.hero {
  padding-top: clamp(56px, 8vw, 96px);
  padding-bottom: clamp(64px, 9vw, 120px);
  background-color: var(--hero-bg, var(--surface));
  color: var(--hero-fg, var(--text));
  transition: background-color .25s ease, color .25s ease;
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.hero.u-hero-home .hero__grid { grid-template-columns: 1fr; }
.hero.u-hero-home .hero__grid > div { width: 100%; max-width: 100%; }
.hero.u-hero-home h1.u-hero-h1-home {
  width: 100%;
  max-width: 100%;
  font-size: clamp(2.125rem, 5.8vw + 1.25rem, 4.75rem);
  line-height: 0.98;
  margin-top: clamp(12px, 3vw, 24px);
}
.hero.u-hero-home .hero__lede { max-width: 42ch; }

/* 4-corner blend of all category colours, layered over a deep ground so
   text stays readable. Activated by data-blend="four" on the hero. */
.hero[data-blend="four"] {
  --hero-fg: var(--color-white);
  --hero-fg-soft: rgba(255,255,255,0.82);
  background:
    radial-gradient(ellipse 70% 60% at 0% 0%, color-mix(in oklab, var(--accent-tmi) 75%, transparent) 0%, transparent 60%),
    radial-gradient(ellipse 70% 60% at 100% 0%, color-mix(in oklab, var(--accent-nem) 75%, transparent) 0%, transparent 60%),
    radial-gradient(ellipse 75% 65% at 100% 100%, color-mix(in oklab, var(--accent-wswr) 75%, transparent) 0%, transparent 60%),
    radial-gradient(ellipse 70% 60% at 0% 100%, color-mix(in oklab, var(--accent-ntaf) 70%, transparent) 0%, transparent 55%),
    #25201D;
}
.hero[data-blend="four"]::after {
  /* subtle grain + center vignette so the blend feels intentional, not muddy */
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 90% 80% at 50% 55%, transparent 0%, rgba(0,0,0,0.18) 100%);
  pointer-events: none;
  z-index: 0;
}
.hero[data-blend="four"] > .wrap { position: relative; z-index: 1; }
.hero__grid {
  display: grid; grid-template-columns: 1.4fr 1fr; gap: 64px; align-items: end;
}
.hero h1 {
  font-family: var(--font-sans); font-weight: 500;
  font-size: clamp(48px, 8.4vw, 124px); line-height: 0.94; letter-spacing: -0.035em;
  margin: 24px 0 0; text-wrap: balance;
  color: var(--hero-fg, var(--text));
}
.hero h1 em { font-family: var(--font-serif); font-style: italic; font-weight: 400; letter-spacing: -0.01em; }
.hero__lede {
  font-size: 19px; line-height: 1.45; color: var(--hero-fg-soft, var(--text-muted)); max-width: 42ch;
  margin: 0 0 28px;
}
.hero__ctas { display: flex; gap: 12px; flex-wrap: wrap; }
.hero__meta {
  display: grid; grid-template-columns: 1fr; gap: 24px 32px;
  font-family: var(--font-mono); font-size: 13px; color: var(--hero-fg-soft, var(--text-muted));
  padding-bottom: 8px;
}
.hero__meta strong { color: var(--hero-fg, var(--text)); display: block; font-family: var(--font-sans); font-size: clamp(40px, 5.4vw, 64px); font-weight: 500; margin-bottom: 6px; letter-spacing: -0.03em; line-height: 0.95; }

/* Hero-scoped eyebrow + buttons adapt to bg via the hero-fg vars */
.hero .eyebrow { color: var(--hero-fg-soft, var(--text-muted)); }
.hero .eyebrow::before { background: var(--hero-fg-soft, var(--text-muted)); }
.hero .btn {
  background: transparent;
  color: var(--hero-fg, var(--text));
  border-color: var(--hero-fg, var(--border));
}
.hero .btn:hover { background: color-mix(in oklab, var(--hero-fg, var(--text)) 14%, transparent); }
.hero .btn--solid {
  background: var(--hero-fg, var(--text));
  color: var(--color-text-primary);
  border-color: var(--hero-fg, var(--text));
}
.hero .btn--solid:hover { background: var(--hero-fg, var(--text)); opacity: 0.9; }

/* ----- Four Problems ----- */
.problems { padding: clamp(72px, 9vw, 120px) 0; }
.problems__grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px;
}
.problem-card {
  position: relative;
  min-height: 380px;
  background: transparent;
  border: 0;
  border-radius: 14px;
  perspective: 1400px;
  outline: none;
}
.problem-card:not(.problem-card--flip) {
  background: var(--surface-raised);
  padding: 36px 36px 32px;
  display: flex; flex-direction: column;
  border: 1px solid var(--border-muted);
  overflow: hidden;
  transition: background .25s ease;
}
.problem-card--flip { cursor: pointer; transition: transform .35s cubic-bezier(.22, 1, .36, 1); }
.problem-card--flip:hover { transform: scale(1.025); z-index: 1; }
.problem-card--flip.is-flipped:hover { transform: none; }
.problem-card--flip:focus-visible { outline: none; box-shadow: 0 0 0 3px var(--text); }

@media (prefers-reduced-motion: reduce) {
  .problem-card--flip:hover { transform: none; }
}

.problem-card__inner {
  position: relative;
  width: 100%;
  min-height: 380px;
  transform-style: preserve-3d;
  transition: transform .7s cubic-bezier(.22, 1, .36, 1);
}
.problem-card.is-flipped .problem-card__inner { transform: rotateY(180deg); }

.problem-card__face {
  position: absolute; inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  display: flex; flex-direction: column;
  padding: 36px 36px 32px;
  border-radius: 14px;
  border: 1px solid var(--border-muted);
  overflow: hidden;
  background: var(--surface-raised);
}
.problem-card__back { transform: rotateY(180deg); }

/* Front face — saturated single-color */
.problem-card__front {
  justify-content: space-between;
  border: 0;
}
.problem-card--tmi .problem-card__front { background: var(--cat-bold); color: var(--cat-on); }
.problem-card--nem .problem-card__front { background: var(--cat-bold); color: var(--cat-on); }
.problem-card--ntaf .problem-card__front { background: var(--cat-bold); color: var(--cat-on); }
.problem-card--wswr .problem-card__front { background: var(--cat-bold); color: var(--cat-on); }

.problem-card__front-motif {
  width: 88px; height: 88px;
  align-self: flex-start;
  color: currentColor;
}
.problem-card__front-title {
  font-family: var(--font-sans); font-weight: 500;
  font-size: clamp(36px, 4vw, 52px);
  line-height: 0.95; letter-spacing: -0.025em;
  margin: 0;
  color: currentColor;
  text-wrap: balance;
}
.problem-card__flip-hint {
  position: absolute; bottom: 24px; right: 28px;
  font-family: var(--font-mono); font-size: 11px;
  letter-spacing: 0.08em; text-transform: uppercase;
  display: inline-flex; align-items: center; gap: 8px;
  line-height: 1;
  opacity: 0.78;
}
.problem-card__flip-hint .arr {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  line-height: 1;
  transition: transform .25s ease;
}
.problem-card__flip-hint .arr svg {
  width: 14px;
  height: 14px;
  display: block;
}
.problem-card--flip:hover .problem-card__flip-hint .arr {
  transform: rotate(60deg);
}

/* Back face — category tint on Browse CTA hover only (when flipped) */
.problem-card.is-flipped .problem-card__back .problem-card__cta::before {
  content: "";
  position: absolute;
  inset: -6px -10px;
  border-radius: 6px;
  background: transparent;
  transition: background .25s ease;
  z-index: -1;
}
.problem-card.is-flipped .problem-card__back:hover .problem-card__cta::before {
  background: var(--cat-muted);
}

/* Stop the Browse link inside the back from getting blocked by the flip click */
.problem-card__back .problem-card__cta { position: relative; z-index: 1; }

/* Compact treatment for 3-up category cards (match mobile card feel). */
.problems__grid--compact .problem-card { min-height: 280px; }
.problems__grid--compact .problem-card__inner { min-height: 280px; }
.problems__grid--compact .problem-card--flip { padding: 0; }
.problems__grid--compact .problem-card__motif { width: 60px; height: 60px; top: 22px; right: 22px; }
.problems__grid--compact .problem-card__front { justify-content: flex-start; }
.problems__grid--compact .problem-card__front-title { margin-top: auto; }
.problems__grid--compact .problem-card__flip-hint {
  position: static;
  margin-top: 12px;
  align-self: flex-start;
  align-items: center;
}
.problems__grid--compact .problem-card__face { padding: 24px 22px 20px; }
.problems__grid--compact .problem-card__back .problem-card__num {
  font-size: 11px;
  padding: 6px 10px;
}
.problems__grid--compact .problem-card__back .problem-card__title {
  font-size: 22px !important;
  margin: 6px 0 12px;
}
.problems__grid--compact .problem-card__back .problem-card__desc {
  font-size: 16px !important;
  line-height: 1.45;
}
.problems__grid--compact .problem-card__back .problem-card__foot {
  margin-top: 16px;
  padding-top: 14px;
}
.problems__grid--compact .problem-card__back .problem-card__count { font-size: 11px; }
.problems__grid--compact .problem-card__back .problem-card__count b { font-size: 15px; }
.problems__grid--compact .problem-card__back .problem-card__cta { font-size: 13px; }
.problems__grid--compact .problem-card__back .problem-card__motif {
  width: 48px;
  height: 48px;
  top: 16px;
  right: 16px;
}

@media (prefers-reduced-motion: reduce) {
  .problem-card__inner { transition: none; }
}
.problem-card__num {
  display: inline-flex; align-self: flex-start; align-items: center;
  font-family: var(--font-mono); font-size: 13px;
  text-transform: uppercase; letter-spacing: 0.08em;
  background: var(--text);
  color: var(--color-white);
  padding: 8px 12px;
  border-radius: 6px;
  line-height: 1;
}
.problem-card--tmi .problem-card__num { background: var(--cat-bold); color: var(--cat-on); }
.problem-card--nem .problem-card__num { background: var(--cat-bold); color: var(--cat-on); }
.problem-card--ntaf .problem-card__num { background: var(--cat-bold); color: var(--cat-on); }
.problem-card--wswr .problem-card__num { background: var(--cat-bold); color: var(--cat-on); }
.problem-card__title {
  font-family: var(--font-sans); font-weight: 500;
  font-size: clamp(28px, 3.2vw, 40px); line-height: 1.02; letter-spacing: -0.025em;
  margin: 8px 0 16px; max-width: 16ch;
}
.problem-card__desc { color: var(--text-muted); max-width: 36ch; margin: 0 0 auto; font-size: 15px; line-height: 1.45; }
.problem-card__foot {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: 28px; padding-top: 20px; border-top: 1px solid var(--border-muted);
}
.problem-card__count { font-family: var(--font-mono); font-size: 12px; color: var(--text-muted); }
.problem-card__count b { font-family: var(--font-sans); font-size: 18px; color: var(--text); font-weight: 500; margin-right: 4px; }
.problem-card__cta { font-family: var(--font-sans); font-weight: 500; font-size: 14.5px; display: inline-flex; align-items: center; gap: 8px; }
.problem-card__motif {
  position: absolute; top: 28px; right: 28px;
  width: 88px; height: 88px;
  border-radius: 14px;
  overflow: hidden;
}
.problem-card--tmi { color: var(--text); }
.problem-card--tmi .problem-card__title { color: var(--cat); }
.problem-card--nem .problem-card__title { color: var(--cat); }
.problem-card--ntaf .problem-card__title { color: var(--cat-ink, var(--cat)); }
.problem-card--wswr .problem-card__title { color: var(--cat); }

/* Homepage problem card backs — more space below category pill */
#problems .problem-card__back .problem-card__title {
  margin-top: 20px;
}

/* Homepage NTAF card back only — #FF9605 (not used elsewhere) */
#problems .problem-card--ntaf .problem-card__back .problem-card__num {
  background: var(--text);
  color: var(--color-white);
}
#problems .problem-card--ntaf .problem-card__back .problem-card__title {
  color: var(--text);
}
#problems .problem-card--ntaf .problem-card__back .problem-card__motif > rect {
  fill: var(--cat-bold);
}
#problems .problem-card--ntaf.is-flipped .problem-card__back:hover .problem-card__cta::before {
  background: color-mix(in oklab, #FF9605 18%, var(--surface));
}

/* ----- Bias Library ----- */
.library { padding: clamp(72px, 9vw, 120px) 0; border-top: 1px solid var(--border); }
.library__tools {
  --library-control-h: 48px;
  display: grid;
  grid-template-columns: minmax(180px, 240px) minmax(0, 1fr);
  grid-template-rows: 1fr auto;
  column-gap: 24px;
  row-gap: 6px;
  position: sticky;
  top: 64px;
  z-index: 10;
  background: var(--surface);
  padding: 16px 0;
  margin: 0 0 24px;
  border-bottom: 1px solid var(--border-muted);
}
.search { display: contents; }
.search__label {
  grid-column: 1;
  grid-row: 1;
  align-self: start;
  margin-bottom: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}
.search__field {
  grid-column: 1;
  grid-row: 2;
  position: relative;
  min-width: 0;
}
.search input {
  width: 100%; height: var(--library-control-h, 48px); padding: 0 16px 0 42px;
  border: 1px solid var(--border-muted); border-radius: 8px;
  background: var(--surface-raised); outline: none;
  font-size: 15px;
  transition: border-color .15s, background .15s, box-shadow .15s;
}
.search input:focus,
.search input:focus-visible { border-color: var(--text); background: var(--surface); box-shadow: 0 0 0 3px var(--border-muted); outline: none; }
.search svg { position: absolute; left: 16px; top: 50%; transform: translateY(-50%); width: 16px; color: var(--text-muted); pointer-events: none; }
.search__kbd { position: absolute; right: 12px; top: 50%; transform: translateY(-50%); font-family: var(--font-mono); font-size: 11px; color: var(--text-subtle); border: 1px solid var(--border-muted); padding: 2px 6px; border-radius: 4px; }

.filter-pills {
  grid-column: 2;
  grid-row: 2;
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  align-items: center;
  justify-self: stretch;
  justify-content: flex-end;
  min-width: 0;
}
.filter-pills__scroll { display: contents; }
.filter-pills .pill {
  height: var(--library-control-h, 48px);
  white-space: nowrap;
  flex-shrink: 0;
}

.pill {
  height: 38px; padding: 0 14px;
  border: 2px solid var(--border-muted); border-radius: 8px;
  font-family: var(--font-mono); font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.08em;
  background: var(--surface-raised);
  display: inline-flex; align-items: center; gap: 8px;
  transition: background .15s, color .15s, border-color .15s;
}
.pill:hover { background: var(--surface-muted); }
.pill .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--text); }
.pill[data-cat="too-much-information"] .dot { background: var(--cat, var(--accent-tmi)); }
.pill[data-cat="not-enough-meaning"] .dot { background: var(--cat, var(--accent-nem)); }
.pill[data-cat="need-to-act-fast"] .dot { background: var(--cat, var(--accent-ntaf)); }
.pill[data-cat="what-should-we-remember"] .dot { background: var(--cat, var(--accent-wswr)); }
.filter-pills .pill:not([data-cat="all"]) {
  padding-left: 0;
  overflow: hidden;
  border-color: var(--cat);
}
.filter-pills .pill[aria-pressed="true"]:not([data-cat="all"]) {
  background: var(--cat-bold);
  color: var(--cat-on);
  border-color: var(--cat-bold);
}
.filter-pills .pill[aria-pressed="true"]:not([data-cat="all"]) .dot {
  background: var(--cat-on);
}
.filter-pills .pill-motif {
  align-self: stretch;
  width: var(--library-control-h, 48px);
  flex-shrink: 0;
  margin-block: -2px;
  margin-left: -2px;
  border-radius: 8px 0 0 8px;
  overflow: hidden;
  display: flex;
}
.filter-pills .pill-motif svg { width: 100%; height: 100%; display: block; }
.pill[aria-pressed="true"] { background: var(--text); color: var(--surface); border-color: var(--text); }
.pill[aria-pressed="true"] .dot { background: var(--surface); }

.bias-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px;
}
.bias-card {
  padding: 24px 24px 22px;
  display: flex; flex-direction: column; gap: 12px; min-height: 220px;
  transition: background .25s ease, transform .25s ease;
  position: relative;
  border-radius: 14px;
  overflow: hidden;
  /* defaults; overridden per category */
  --card-bg: var(--surface);
  --card-bg-hover: var(--surface-raised);
  --card-fg: var(--text);
  --card-fg-soft: rgba(255,255,255,0.78);
  --card-rule: rgba(255,255,255,0.28);
  background: var(--card-bg);
  color: var(--card-fg);
}
.bias-card:hover { background: var(--card-bg-hover); }

/* TMI — deep red */
.bias-card[data-cat="too-much-information"] {
  --card-bg: var(--cat-bold);
  --card-bg-hover: color-mix(in oklab, var(--cat-bold) 92%, black);
  --card-fg: var(--cat-on);
  --card-fg-soft: var(--cat-on-soft);
  --card-rule: var(--cat-rule);
}
/* NEM */
.bias-card[data-cat="not-enough-meaning"] {
  --card-bg: var(--cat-bold);
  --card-bg-hover: color-mix(in oklab, var(--cat-bold) 88%, black);
  --card-fg: var(--cat-on);
  --card-fg-soft: var(--cat-on-soft);
  --card-rule: var(--cat-rule);
}
/* NTAF */
.bias-card[data-cat="need-to-act-fast"] {
  --card-bg: var(--cat-bold);
  --card-bg-hover: color-mix(in oklab, var(--cat-bold) 90%, black);
  --card-fg: var(--cat-on);
  --card-fg-soft: var(--cat-on-soft);
  --card-rule: var(--cat-rule);
}
/* WSWR */
.bias-card[data-cat="what-should-we-remember"] {
  --card-bg: var(--cat-bold);
  --card-bg-hover: color-mix(in oklab, var(--cat-bold) 88%, black);
  --card-fg: var(--cat-on);
  --card-fg-soft: var(--cat-on-soft);
  --card-rule: var(--cat-rule);
}

.bias-card[data-cat="too-much-information"] .bias-card__sum,
.bias-card[data-cat="not-enough-meaning"] .bias-card__sum,
.bias-card[data-cat="what-should-we-remember"] .bias-card__sum {
  color: var(--color-white);
  opacity: 1;
}

.bias-card__name {
  font-family: var(--font-sans); font-weight: 500;
  font-size: 22px; line-height: 1.1; letter-spacing: -0.02em;
  margin: 0;
  color: var(--card-fg);
}
.bias-card__sum {
  color: var(--card-fg); opacity: 0.9;
  font-size: 15px; line-height: 1.45; margin: 0;
}
.bias-card__rel {
  font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--card-fg-soft); margin-top: auto;
  padding-top: 14px; border-top: 1px solid var(--card-rule);
  display: flex; justify-content: space-between; align-items: center;
}
.bias-card__rel .arr { color: var(--card-fg); }
.bias-card__tag {
  font-size: 11px; color: var(--card-fg-soft);
  text-transform: lowercase; letter-spacing: 0.02em;
}
/* Badge inside the card: inverted — filled with the card's text color,
   text in the card's background color. Crisper corners than the global pill. */
.bias-card .badge {
  color: var(--card-bg);
  background: var(--card-fg);
  border-color: var(--card-fg);
  border-radius: 5px;
  padding: 5px 9px;
  opacity: 1;
}
.bias-card .badge .dot { background: var(--card-bg); }
.bias-card__rel .arr { transition: transform .15s; }
.bias-card:hover .arr { transform: translateX(3px); }
.bias-card__head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.bias-card[data-published="false"] { opacity: 0.62; }
.bias-card[data-published="false"] .bias-card__rel::after { content: "Coming soon"; font-family: var(--font-mono); }
.bias-card[data-published="false"] .bias-card__rel .arr { display: none; }

.empty-state {
  padding: 64px 24px; text-align: center; color: var(--text-muted);
  font-family: var(--font-serif); font-style: italic; font-size: 22px;
}

/* ----- Bias library list (homepage) ----- */
.bias-list {
  border: 1px solid var(--border-muted);
  border-radius: 14px;
  background: var(--surface-raised);
}
.bias-list__head,
.bias-list__row {
  display: grid;
  grid-template-columns: 6px 56px minmax(200px, 1.6fr) minmax(260px, 2.6fr) 60px;
  gap: 24px;
  align-items: center;
}
.bias-list__row[hidden] {
  display: none !important;
}
.bias-list__sticky-sentinel {
  height: 1px;
  margin: 0;
  pointer-events: none;
  visibility: hidden;
}
.bias-list__head {
  position: sticky;
  top: 144px;
  z-index: 5;
  padding: 14px 22px 14px 0;
  font-family: var(--font-mono); font-size: 10.5px;
  text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--text-subtle);
  background: var(--surface-muted);
  border-bottom: 1px solid var(--border-muted);
  border-radius: 13px 13px 0 0;
  transition: border-radius .2s ease;
}
.bias-list__head.is-stuck {
  border-radius: 0;
}
.bias-list:has(.bias-list__head.is-stuck) {
  border-top-left-radius: 0;
  border-top-right-radius: 0;
}
.bias-list__head > span:first-child { visibility: hidden; }
.bias-list__row {
  padding: 18px 22px 18px 0;
  border-bottom: 1px solid var(--border-muted);
  color: var(--text);
  background-color: var(--surface);
  position: relative;
  transition: background .2s ease;
}
.bias-list__row:nth-of-type(even) {
  background-color: color-mix(in oklab, var(--surface-muted) 22%, var(--surface-raised));
}
[data-theme="dark"] .bias-list__row:nth-of-type(even) {
  background-color: color-mix(in oklab, var(--surface) 35%, var(--surface-muted));
}
.bias-list__row:last-child { border-bottom: 0; border-radius: 0 0 13px 13px; overflow: hidden; }
.bias-list__row:hover { background: var(--cat-tint, var(--surface-muted)); }
.bias-list__row[data-cat="too-much-information"] { --cat-bar: var(--cat-bold); --cat-ink: var(--cat-bold); --cat-tint: var(--cat-muted); }
.bias-list__row[data-cat="not-enough-meaning"] { --cat-bar: var(--cat-bold); --cat-ink: var(--cat-bold); --cat-tint: var(--cat-muted); }
.bias-list__row[data-cat="need-to-act-fast"] { --cat-bar: var(--cat-bold); --cat-ink: var(--cat-ink, var(--cat)); --cat-tint: var(--cat-muted); }
.bias-list__row[data-cat="what-should-we-remember"] { --cat-bar: var(--cat-bold); --cat-ink: var(--cat-bold); --cat-tint: var(--cat-muted); }

.bias-list__bar { background: var(--cat-bar, var(--text)); align-self: stretch; }
.bias-list__num {
  font-family: var(--font-mono); font-size: 11.5px; color: var(--text-subtle);
  letter-spacing: 0.04em;
}
.bias-list__name-wrap { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.bias-list__name {
  font-family: var(--font-sans); font-weight: 500;
  font-size: 19px; line-height: 1.15; letter-spacing: -0.015em;
  margin: 0; color: var(--text);
}
.bias-list__sum {
  font-size: 15px; color: var(--text-muted); margin: 0; line-height: 1.4;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.bias-list__tags { display: flex; flex-wrap: wrap; gap: 6px; }
.bias-list__tag {
  font-family: var(--font-mono); font-size: 10.5px;
  text-transform: lowercase; letter-spacing: 0.02em;
  color: var(--text-muted);
  background: var(--surface-muted);
  padding: 4px 8px; border-radius: 4px;
  line-height: 1;
}
.bias-list__row:hover .bias-list__tag { background: rgba(255,255,255,0.55); }
.bias-list__arr {
  font-family: var(--font-sans); color: var(--text-subtle);
  justify-self: end;
  transition: transform .15s ease, color .15s ease;
}
.bias-list__row:hover .bias-list__arr { transform: translateX(3px); color: var(--cat-ink, var(--text)); }
.bias-list__row[data-published="false"] { opacity: 0.5; pointer-events: none; }
.bias-list__row[data-published="false"] .bias-list__arr { font-family: var(--font-mono); font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.06em; }
.bias-list__row[data-published="false"] .bias-list__arr > span { display: none; }
.bias-list__row[data-published="false"] .bias-list__arr::after { content: "soon"; }

/* ----- Footer ----- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 64px 0 32px;
  background: var(--surface-inverse);
  color: var(--text-inverse);
  overflow-x: clip;
}
.site-footer .wrap {
  container-type: inline-size;
}
.site-footer .wrap > .row {
  display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 48px;
  margin-bottom: 64px;
}
.site-footer h3 {
  font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--text-inverse-subtle); margin: 0 0 16px; font-weight: 400;
}
.site-footer ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; font-size: 15px; }
.site-footer ul a { color: var(--text-inverse); }
.site-footer ul a:hover { text-decoration: underline; text-underline-offset: 4px; }
.site-footer .footer-muted { color: var(--text-inverse-subtle); font-size: 15px; }
.site-footer__about p { color: var(--text-inverse-muted); font-size: 15px; max-width: 38ch; margin: 0; }
.site-footer__bottom {
  display: flex; justify-content: space-between; align-items: end;
  font-family: var(--font-mono); font-size: 11.5px; color: var(--text-inverse-subtle);
  padding-top: 24px; border-top: 1px solid var(--border-inverse);
  flex-wrap: wrap; gap: 24px;
}
.site-footer__bottom .big,
.site-footer .big {
  font-family: var(--font-sans);
  font-size: clamp(1.75rem, 9cqi, 11.25rem);
  line-height: 0.95;
  letter-spacing: -0.04em;
  color: var(--text-inverse);
  max-width: 100%;
  text-wrap: balance;
}
.site-footer .big em.serif-it { color: var(--text-inverse-subtle); }
/* ----- Category page hero ----- */
.cat-hero {
  padding: clamp(64px, 8vw, 110px) 0 clamp(56px, 7vw, 88px);
  position: relative; overflow: hidden;
  border-bottom: 1px solid var(--border);
  background: var(--cat-bg, var(--surface));
  color: var(--cat-fg, var(--text));
  transition: background-color .2s ease, color .2s ease;
}

.cat-hero--inverse {
  --cat-bg: var(--surface-inverse);
  --cat-fg: var(--text-inverse);
  --cat-fg-soft: var(--text-inverse-muted);
  --cat-rule: var(--border-inverse);
  --cat-strong: var(--text-inverse);
  border-bottom-color: var(--border-inverse);
}


.cat-hero[data-cat="tmi"],
.bias-hero[data-cat="tmi"]  { --cat-bg: var(--cat-bold); --cat-fg: var(--cat-on); --cat-fg-soft: var(--cat-on-soft); --cat-strong: var(--cat-on); }
.cat-hero[data-cat="nem"],
.bias-hero[data-cat="nem"]  { --cat-bg: var(--cat-bold); --cat-fg: var(--cat-on); --cat-fg-soft: var(--cat-on-soft); --cat-strong: var(--cat-on); }
.cat-hero[data-cat="ntaf"],
.bias-hero[data-cat="ntaf"] { --cat-bg: var(--cat-bold); --cat-fg: var(--cat-on); --cat-fg-soft: var(--cat-on-soft); --cat-strong: var(--cat-on); }
.cat-hero[data-cat="wswr"],
.bias-hero[data-cat="wswr"] { --cat-bg: var(--cat-bold); --cat-fg: var(--cat-on); --cat-fg-soft: var(--cat-on-soft); --cat-strong: var(--cat-on); }
.cat-hero[data-cat],
.bias-hero[data-cat] {
  --cat-rule: var(--cat-fg);
  --cat-rule-muted: color-mix(in oklab, var(--cat-fg) 20%, transparent);
}

.cat-hero .crumb { color: var(--cat-fg-soft); }
.cat-hero .crumb a:hover { color: var(--cat-fg); }
.cat-hero__grid {
  display: grid; grid-template-columns: 1.3fr 1fr; gap: 64px; align-items: end;
}
.cat-hero h1 {
  font-family: var(--font-sans); font-weight: 500;
  font-size: clamp(48px, 8vw, 112px); line-height: 0.94; letter-spacing: -0.035em;
  margin: 16px 0 0;
  color: var(--cat-strong, var(--text));
}
.cat-hero__num {
  font-family: var(--font-mono); font-size: 12px; color: var(--cat-fg-soft, var(--text-muted));
}
.cat-hero__pill {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 11.5px;
  text-transform: uppercase; letter-spacing: 0.1em;
  background: var(--cat-fg, var(--text));
  color: var(--cat-bg, var(--surface));
  padding: 6px 11px;
  border-radius: 5px;
  line-height: 1;
}
.cat-hero__pill .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--cat-bg, var(--surface)); }
.cat-hero__lede { font-size: 19px; color: var(--cat-fg-soft, var(--text-muted)); max-width: 44ch; margin: 24px 0 0; }
.cat-hero__meta-list { display: grid; grid-template-columns: 1fr; gap: 0; border-top: 1px solid var(--cat-rule, var(--border)); }
.cat-hero__meta-list > div {
  display: flex; justify-content: space-between; padding: 18px 0;
  border-bottom: 1px solid var(--cat-rule-muted, var(--cat-rule, var(--border)));
  font-family: var(--font-mono); font-size: 14px; color: var(--cat-fg-soft, var(--text-muted));
}
.cat-hero__meta-list > div span:last-child { color: var(--cat-fg, var(--text)); }

/* Category hero motif: opacity-only organic flicker (no transform). */
@keyframes cat-hero-motif-fade {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.42; }
}

.cat-hero:not([data-cat="tmi"]) .cat-hero__motif:not(.nem-network-motif):not(.ntaf-bars-motif) > g > rect,
.cat-hero__motif:not(.nem-network-motif):not(.ntaf-bars-motif) > g > circle,
.cat-hero__motif:not(.nem-network-motif):not(.ntaf-bars-motif) > g > line {
  animation: cat-hero-motif-fade 4.5s ease-in-out infinite;
}

/* NEM category hero network: drift + hover (nodes injected by site.js) */
.nem-network-motif .nem-network__lines line,
.nem-network-motif .nem-network__node circle {
  opacity: 1;
}
.nem-network-motif .nem-network__node {
  transform-box: fill-box;
  transform-origin: center;
  cursor: pointer;
}
.nem-network-motif .nem-network__lines line {
  transition: none;
}
@media (prefers-reduced-motion: reduce) {
  .nem-network-motif .nem-network__node { cursor: default; }
}

/* NTAF category hero — random bar length (width animated by site.js) */
.cat-hero[data-cat="ntaf"] .ntaf-bars-motif {
  pointer-events: auto;
}
.ntaf-bars-motif .ntaf-bar {
  cursor: pointer;
}
.ntaf-bars-motif .ntaf-bar__shaft {
  animation: none;
  opacity: 1;
}

/* WSWR — nested memory frames */
.cat-hero[data-cat="wswr"] .cat-hero__motif > g > rect:nth-child(6n+1) { animation-duration: 4s;   animation-delay: -0.3s; }
.cat-hero[data-cat="wswr"] .cat-hero__motif > g > rect:nth-child(6n+2) { animation-duration: 5.2s; animation-delay: -1.9s; }
.cat-hero[data-cat="wswr"] .cat-hero__motif > g > rect:nth-child(6n+3) { animation-duration: 3.9s; animation-delay: -2.8s; }
.cat-hero[data-cat="wswr"] .cat-hero__motif > g > rect:nth-child(6n+4) { animation-duration: 5.6s; animation-delay: -1.2s; }
.cat-hero[data-cat="wswr"] .cat-hero__motif > g > rect:nth-child(6n+5) { animation-duration: 4.3s; animation-delay: -3.3s; }
.cat-hero[data-cat="wswr"] .cat-hero__motif > g > rect:nth-child(6n)   { animation-duration: 3.7s; animation-delay: -0.9s; }

/* WSWR problem cards — nested frames (3 rings + core) */
.problem-card--wswr [data-wswr-core-attract] > g > rect:not([fill]) {
  animation: cat-hero-motif-fade 4.5s ease-in-out infinite;
}
.problem-card--wswr [data-wswr-core-attract] > g > rect:nth-child(3n+1) { animation-duration: 4s;   animation-delay: -0.3s; }
.problem-card--wswr [data-wswr-core-attract] > g > rect:nth-child(3n+2) { animation-duration: 5.2s; animation-delay: -1.9s; }
.problem-card--wswr [data-wswr-core-attract] > g > rect:nth-child(3n)   { animation-duration: 3.9s; animation-delay: -2.8s; }

/* TMI square grid: opacity flicker + hover (cells injected by site.js) */
@keyframes tmi-grid-cell-fade {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.42; }
}
.tmi-grid-motif .tmi-grid__cell > rect {
  animation: tmi-grid-cell-fade 4.5s ease-in-out infinite;
}
.tmi-grid-motif .tmi-grid__cell:nth-child(7n+1) > rect { animation-duration: 3.6s; animation-delay: -0.4s; }
.tmi-grid-motif .tmi-grid__cell:nth-child(7n+2) > rect { animation-duration: 5.1s; animation-delay: -1.8s; }
.tmi-grid-motif .tmi-grid__cell:nth-child(7n+3) > rect { animation-duration: 4.2s; animation-delay: -2.6s; }
.tmi-grid-motif .tmi-grid__cell:nth-child(7n+4) > rect { animation-duration: 6s;   animation-delay: -0.9s; }
.tmi-grid-motif .tmi-grid__cell:nth-child(7n+5) > rect { animation-duration: 3.9s; animation-delay: -3.2s; }
.tmi-grid-motif .tmi-grid__cell:nth-child(7n+6) > rect { animation-duration: 5.4s; animation-delay: -1.3s; }
.tmi-grid-motif .tmi-grid__cell:nth-child(7n)   > rect { animation-duration: 4.8s; animation-delay: -2.1s; }
.tmi-grid-motif .tmi-grid__cell {
  transform-box: fill-box;
  transform-origin: center;
  transition: transform 0.38s cubic-bezier(0.34, 1.28, 0.64, 1);
  cursor: pointer;
}
.tmi-grid-motif.is-interacting .tmi-grid__cell > rect {
  animation-play-state: paused;
}
.problem-card__front-motif.tmi-grid-motif,
.problem-card__motif.tmi-grid-motif,
.problem-card__front-motif.nem-network-motif,
.problem-card__motif.nem-network-motif,
.problem-card__front-motif[data-wswr-core-attract],
.problem-card__motif[data-wswr-core-attract],
.problem-card__front-motif.ntaf-bars-motif,
.problem-card__motif.ntaf-bars-motif {
  pointer-events: auto;
}
@media (prefers-reduced-motion: reduce) {
  .tmi-grid-motif .tmi-grid__cell > rect { animation: none; }
  .tmi-grid-motif .tmi-grid__cell { transition: none; cursor: default; }
}

.crumb {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  line-height: 1;
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}
.crumb a,
.crumb .sep {
  display: inline-flex;
  align-items: center;
  line-height: 1;
}
.crumb a:hover { color: var(--text); }
.crumb .sep { opacity: 0.5; }
.crumb__home {
  display: inline-flex;
  align-items: center;
  line-height: 1;
}
.crumb__home svg { width: 18px; height: 18px; display: block; }

.cat-section { padding: clamp(64px, 8vw, 110px) 0; }
.cat-section h2 { font-family: var(--font-sans); font-weight: 500; font-size: clamp(28px, 3.2vw, 44px); letter-spacing: -0.025em; margin: 0 0 32px; }

/* ----- Recommended reading ----- */
.book-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  align-items: start;
}
.book-grid__empty {
  margin: 0;
  color: var(--text-muted);
  font-size: 16px;
}
.book-card {
  display: flex;
  flex-direction: column;
  background: var(--surface-raised);
  border: 1px solid var(--border-muted);
  border-radius: 14px;
  overflow: hidden;
}
.book-card__cover {
  background: var(--surface-muted);
}
a.book-card__cover {
  display: block;
  color: inherit;
  text-decoration: none;
}
a.book-card__cover:focus-visible {
  outline: none;
  box-shadow: inset 0 0 0 3px var(--border-muted);
}
.book-card__cover img {
  width: 100%;
  height: auto;
  display: block;
}
.book-card__cover--placeholder {
  aspect-ratio: 2 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  text-align: center;
}
.book-card__cover--placeholder span {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(18px, 2.5vw, 24px);
  color: var(--text-muted);
  line-height: 1.2;
}
.book-card__body {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 24px 24px;
  flex: 1;
}
.book-card__title {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 20px;
  letter-spacing: -0.02em;
  margin: 0;
  line-height: 1.15;
}
.book-card__author {
  font-family: var(--font-mono);
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin: 0;
}
.book-card__desc {
  font-size: 15px;
  line-height: 1.5;
  color: var(--text-muted);
  margin: 0;
  flex: 1;
}
.book-card__cta { margin-top: 8px; align-self: flex-start; }
.book-card__cta:focus-visible { outline: none; box-shadow: 0 0 0 3px var(--border-muted); }

/* ----- Bias page ----- */
.bias-hero {
  padding: clamp(56px, 7vw, 96px) 0 clamp(40px, 5vw, 64px);
  border-bottom: 1px solid var(--border);
  background: var(--cat-bg, var(--surface));
  color: var(--cat-fg, var(--text));
  transition: background-color .2s ease, color .2s ease;
  position: relative;
}

.bias-hero .crumb { color: var(--cat-fg-soft, var(--text-muted)); }
.bias-hero .crumb a:hover { color: var(--cat-fg, var(--text)); }
.bias-hero .badge {
  color: var(--cat-fg, currentColor);
  border-color: var(--cat-fg, currentColor);
}
.bias-hero .badge .dot { background: var(--cat-fg, currentColor); }
.bias-hero__top { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin-bottom: 36px; flex-wrap: wrap; }
.bias-hero__top > .mono,
.bias-hero__meta { font-size: 13px; color: var(--cat-fg-soft, var(--text-subtle)); }
.bias-hero h1 {
  font-family: var(--font-sans); font-weight: 500;
  font-size: clamp(44px, 7.5vw, 104px); line-height: 0.94; letter-spacing: -0.035em;
  margin: 8px 0 24px; text-wrap: balance;
  color: var(--cat-strong, var(--text));
}
.bias-hero h1 em { font-family: var(--font-serif); font-style: italic; font-weight: 400; }
.bias-hero__sum {
  font-family: var(--font-serif); font-style: italic; font-weight: 400;
  font-size: clamp(22px, 2.6vw, 32px); line-height: 1.25;
  color: var(--cat-fg-soft, var(--text-muted)); max-width: 32ch; margin: 0;
}
.bias-hero__lede { font-size: 19px; color: var(--cat-fg-soft, var(--text-muted)); max-width: 48ch; margin: 24px 0 0; }

.bias-hero__share {
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translate(-50%, 50%);
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.bias-share {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 24px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.02em;
  background: var(--color-white);
  color: var(--text);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: background .15s ease, border-color .15s ease;
}
.bias-share:hover { background: var(--surface-raised); }
.bias-share:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--text) 25%, transparent);
}
.bias-share__status {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.bias-body { padding: clamp(48px, 6vw, 80px) 0 clamp(72px, 9vw, 120px); }
.bias-body__grid {
  display: grid; grid-template-columns: 240px 1fr;
  gap: clamp(40px, 6vw, 96px);
}
.bias-sidebar {
  position: sticky; top: 88px; align-self: start;
  height: max-content;
  background: var(--surface-raised);
  border: 1px solid var(--border-muted);
  border-radius: 14px;
  padding: 24px 24px 28px;
}
.bias-sidebar h4 {
  font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--text-muted); font-weight: 400; margin: 24px 0 12px;
}
.bias-sidebar h4:first-child { margin-top: 0; }
.bias-sidebar ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; }
.bias-sidebar ul a {
  display: block; padding: 7px 0; font-size: 14.5px; color: var(--text-muted);
  border-bottom: 1px solid var(--border-muted);
  transition: color .15s, padding .15s;
}
.bias-sidebar ul a:hover { color: var(--text); }
.bias-sidebar ul a.active { color: var(--text); padding-left: 12px; position: relative; }
.bias-sidebar ul a.active::before { content: ""; position: absolute; left: 0; top: 50%; transform: translateY(-50%); width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.bias-sidebar .quick { display: flex; flex-direction: column; gap: 4px; }
.bias-sidebar .quick a { font-size: 14.5px; padding: 6px 0; }

/* Filed under — topic tags as badges */
.bias-sidebar h4:last-of-type + .quick {
  flex-direction: row;
  flex-wrap: wrap;
  gap: 8px;
}
.bias-sidebar h4:last-of-type + .quick a {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 5px 10px 5px 8px;
  border: 1px solid var(--border);
  border-radius: 999px;
  line-height: 1;
  color: var(--text-muted);
  transition: color .15s ease, border-color .15s ease, background .15s ease;
}
.bias-sidebar h4:last-of-type + .quick a:hover {
  color: var(--text);
  border-color: color-mix(in oklab, var(--text) 25%, var(--border));
  background: var(--surface-muted);
}

.bias-content {
  max-width: 720px;
}
.bias-content section { padding: 36px 0; border-top: 1px solid var(--border-muted); scroll-margin-top: 88px; }
.bias-content section:first-of-type { padding-top: 0; border-top: 0; }
.bias-content h2 {
  font-family: var(--font-sans); font-weight: 500;
  font-size: clamp(26px, 2.6vw, 34px); letter-spacing: -0.02em;
  margin: 0 0 20px; line-height: 1.1;
}
.bias-content h2 .num { font-family: var(--font-mono); font-size: 13px; color: var(--text-subtle); font-weight: 400; letter-spacing: 0; margin-right: 12px; vertical-align: 0.25em; }
.bias-content p { font-size: 17.5px; line-height: 1.65; margin: 0 0 16px; color: var(--text); }
.bias-content p.lead { font-size: 19.5px; line-height: 1.55; }
.bias-content ul { padding-left: 0; list-style: none; margin: 0 0 16px; }
.bias-content ul li { position: relative; padding: 10px 0 10px 28px; border-top: 1px solid var(--border-muted); font-size: 16.5px; line-height: 1.55; }
.bias-content ul li::before { content: ""; position: absolute; left: 0; top: 19px; width: 14px; height: 1px; background: var(--text); }
.bias-content ul li:last-child { border-bottom: 1px solid var(--border-muted); }

/* Inline prose links (bias cross-links in article body) */
.bias-content p a:not(.btn),
.bias-content li a:not(.btn),
.bias-content .callout p a:not(.btn),
.bias-content .example p a:not(.btn) {
  color: var(--text-link);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
  text-decoration-color: color-mix(in oklab, var(--text-link) 55%, transparent);
}
.bias-content p a:not(.btn):hover,
.bias-content li a:not(.btn):hover,
.bias-content .callout p a:not(.btn):hover,
.bias-content .example p a:not(.btn):hover {
  text-decoration-color: var(--text-link);
}
.bias-content p a:not(.btn):focus-visible,
.bias-content li a:not(.btn):focus-visible,
.bias-content .callout p a:not(.btn):focus-visible,
.bias-content .example p a:not(.btn):focus-visible {
  outline: 3px solid var(--text);
  outline-offset: 2px;
  text-decoration-color: var(--text-link);
}

.callout {
  margin: 24px 0; padding: 24px 28px;
  border: 1px solid var(--callout-border, currentColor);
  border-radius: 4px;
  position: relative;
}
.callout--tmi {
  color: var(--accent-tmi);
  --callout-border: color-mix(in oklab, var(--accent-tmi) 28%, var(--border-muted));
  background: color-mix(in oklab, var(--accent-tmi) 14%, var(--surface));
}
.callout--nem {
  color: var(--accent-nem);
  --callout-border: color-mix(in oklab, var(--accent-nem) 28%, var(--border-muted));
  background: color-mix(in oklab, var(--accent-nem) 14%, var(--surface));
}
.callout--ntaf {
  color: var(--accent-ntaf);
  --callout-border: color-mix(in oklab, var(--accent-ntaf) 32%, var(--border-muted));
  background: color-mix(in oklab, var(--accent-ntaf) 18%, var(--surface));
}
.callout--ntaf strong {
  color: var(--text);
}
.callout--wswr {
  color: var(--accent-wswr);
  --callout-border: color-mix(in oklab, var(--accent-wswr) 28%, var(--border-muted));
  background: color-mix(in oklab, var(--accent-wswr) 14%, var(--surface));
}
.callout strong { display: block; font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.12em; margin-bottom: 8px; }
.callout p { color: var(--text); font-size: 16.5px; margin: 0; }

.example-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px;
  margin: 24px 0;
}
.example {
  border: 1px solid var(--border); border-radius: 4px; padding: 20px;
  background: var(--surface-raised);
}
.example .tag { font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-muted); }
.example h4 { font-family: var(--font-sans); font-weight: 500; font-size: 17px; margin: 6px 0 8px; letter-spacing: -0.01em; }
.example p { font-size: 14.5px; color: var(--text-muted); margin: 0; line-height: 1.5; }

.refs { list-style: decimal; padding-left: 24px; margin: 0; }
.refs li { padding: 6px 0; font-size: 15.5px; color: var(--text-muted); border: 0; }
.refs li::before { display: none; }
.refs a {
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-color: color-mix(in oklab, var(--text) 35%, transparent);
}
.refs a:hover { text-decoration-color: var(--text); }
.bias-content a[href^="http"]:not(.btn):has(.external-link__icon) {
  text-decoration: none;
}
.bias-content a[href^="http"]:not(.btn):has(.external-link__icon) em {
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-color: color-mix(in oklab, var(--text) 35%, transparent);
}
.bias-content a[href^="http"]:not(.btn):has(.external-link__icon):hover em {
  text-decoration-color: var(--text);
}
.bias-content a[href^="http"]:not(.btn):not(:has(em)):has(.external-link__icon) {
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-color: color-mix(in oklab, var(--text-link, var(--text)) 55%, transparent);
}
.external-link__icon {
  display: inline-block;
  width: 0.9em;
  height: 0.9em;
  margin-left: 0.2em;
  vertical-align: -0.1em;
  flex-shrink: 0;
}
.suggested-reading .refs em.serif-it {
  font-style: italic;
  font-weight: 700;
  letter-spacing: 1px;
}
.suggested-reading__fallback {
  font-size: 15.5px;
  color: var(--text-muted);
  margin: 0;
}
.bias-content p.suggested-reading__footer {
  margin-top: 20px;
}

.related-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.bias-content .related-cards .bias-card__head { display: none; }
.bias-content .related-cards .bias-card__rel > span:not(.arr) {
  text-transform: none;
  letter-spacing: 0.02em;
}

/* ----- Mobile (max-width: 880px) ----- */
@media (max-width: 880px) {
  .primary-nav { display: none; }
  .hamburger { display: inline-grid; place-items: center; }

  .bias-sidebar.is-mobile-nav.is-pinned {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    z-index: 45;
    margin: 0;
    border-radius: 0;
    border-left: 0;
    border-right: 0;
    padding: 0;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  }
  .bias-sidebar.is-mobile-nav .bias-sidebar__toggle {
    display: none;
    width: 100%;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 14px var(--space-gutter);
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text);
    background: var(--surface-raised);
    border: 0;
    border-bottom: 1px solid var(--border-muted);
    text-align: left;
  }
  .bias-sidebar.is-mobile-nav.is-pinned .bias-sidebar__toggle {
    display: flex;
  }
  .bias-sidebar.is-mobile-nav .bias-sidebar__toggle-label {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .bias-sidebar.is-mobile-nav .bias-sidebar__toggle-icon {
    flex-shrink: 0;
    font-size: 10px;
    transition: transform .2s ease;
  }
  .bias-sidebar.is-mobile-nav.is-expanded .bias-sidebar__toggle-icon {
    transform: rotate(180deg);
  }
  .bias-sidebar.is-mobile-nav.is-pinned:not(.is-expanded) .bias-sidebar__panel {
    display: none;
  }
  .bias-sidebar.is-mobile-nav.is-pinned.is-expanded .bias-sidebar__panel {
    display: block;
    max-height: min(70vh, 520px);
    overflow-y: auto;
    padding: 20px var(--space-gutter) 24px;
    border-bottom: 1px solid var(--border-muted);
  }
  .bias-sidebar.is-mobile-nav:not(.is-pinned) .bias-sidebar__panel {
    display: block;
  }
  .bias-sidebar__placeholder:not([hidden]) {
    display: block;
  }

  .site-header .logo {
    flex: 1;
    min-width: 0;
    margin-right: 12px;
  }
  .site-header .logo.is-marquee .logo__text-track {
    animation: logo-text-marquee var(--logo-marquee-duration, 22s) linear infinite;
  }

  .hero__grid { grid-template-columns: 1fr; gap: 40px; }
  .hero.u-hero-home {
    padding-top: clamp(20px, 5vw, 30px);
    padding-bottom: clamp(36px, 9vw, 48px);
  }
  .hero.u-hero-home .hero__grid { gap: 0; }
  .hero.u-hero-home h1.u-hero-h1-home {
    font-size: clamp(1.625rem, 7.2vw + 0.5rem, 2.75rem);
    line-height: 1.02;
    letter-spacing: -0.03em;
  }
  .hero.u-hero-home .hero__lede,
  .hero.u-hero-home .u-hero-lede-home {
    margin-top: clamp(16px, 4vw, 24px);
    margin-bottom: clamp(20px, 5vw, 28px);
    font-size: clamp(15px, 3.8vw, 17px);
    line-height: 1.5;
    max-width: 100%;
  }
  .hero.u-hero-home .eyebrow {
    font-size: clamp(9px, 2.2vw, 10px);
    letter-spacing: 0.1em;
    gap: 6px;
    line-height: 1.4;
  }
  .hero.u-hero-home .hero__ctas {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }
  .hero.u-hero-home .hero__ctas .btn {
    width: 100%;
    justify-content: center;
    height: 48px;
  }

  .problems__grid { grid-template-columns: 1fr; }
  .problem-card { min-height: 280px; }
  .problem-card__inner { min-height: 280px; }
  .problem-card--flip { padding: 0; }
  .problem-card__motif { width: 60px; height: 60px; top: 22px; right: 22px; }
  .problem-card__front {
    justify-content: flex-start;
  }
  .problem-card__front-title {
    margin-top: auto;
  }
  .problem-card__flip-hint {
    position: static;
    margin-top: 12px;
    align-self: flex-start;
    align-items: center;
  }
  .problem-card__face {
    padding: 24px 22px 20px;
  }
  .problem-card__back .problem-card__num {
    font-size: 11px;
    padding: 6px 10px;
  }
  .problem-card__back .problem-card__title {
    font-size: 22px !important;
    margin: 6px 0 12px;
  }
  #problems .problem-card__back .problem-card__title {
    margin-top: 14px;
  }
  .problem-card__back .problem-card__desc {
    font-size: 16px !important;
    line-height: 1.45;
  }
  .problem-card__back .problem-card__foot {
    margin-top: 16px;
    padding-top: 14px;
  }
  .problem-card__back .problem-card__count { font-size: 11px; }
  .problem-card__back .problem-card__count b { font-size: 15px; }
  .problem-card__back .problem-card__cta { font-size: 13px; }
  .problem-card__back .problem-card__motif {
    width: 48px;
    height: 48px;
    top: 16px;
    right: 16px;
  }

  .filter-pills {
    flex-wrap: nowrap;
    align-items: center;
    min-width: 0;
    justify-content: flex-start;
  }
  .filter-pills > .pill[data-cat="all"] { flex-shrink: 0; }
  .filter-pills__scroll {
    display: flex;
    flex-wrap: nowrap;
    gap: 8px;
    min-width: 0;
    flex: 1;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
  }
  .filter-pills__scroll::-webkit-scrollbar { display: none; }
  .filter-pills__scroll .pill { flex-shrink: 0; }

  .library__tools {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
  }
  .search {
    display: block;
    width: 100%;
    min-width: 0;
    max-width: none;
  }
  .search__label {
    grid-column: unset;
    grid-row: unset;
    margin-bottom: 6px;
  }
  .search__field {
    grid-column: unset;
    grid-row: unset;
  }
  .filter-pills {
    grid-column: unset;
    grid-row: unset;
    justify-self: unset;
    width: 100%;
  }

  .bias-grid { grid-template-columns: 1fr; }
  .book-grid { grid-template-columns: 1fr; }

  .bias-list__head { display: none; }
  .bias-list__row {
    grid-template-columns: 6px 1fr 28px;
    gap: 14px;
    padding: 16px 18px 16px 0;
  }
  .bias-list__num,
  .bias-list__sum { display: none; }

  .site-footer .wrap > .row { grid-template-columns: 1fr 1fr; }

  .cat-hero__grid { grid-template-columns: 1fr; gap: 40px; }

  .bias-hero .crumb > span:last-child,
  .bias-hero .crumb > span.sep:nth-last-child(2) {
    display: none;
  }

  .bias-hero .crumb,
  .bias-hero .bias-hero__meta {
    font-size: 12px;
  }

  .bias-hero .badge {
    font-size: calc(15px * 0.85);
    padding: calc(7px * 0.85) calc(15px * 0.85) calc(7px * 0.85) calc(12px * 0.85);
    gap: calc(8px * 0.85);
  }
  .bias-hero .badge .dot {
    width: calc(8px * 0.85);
    height: calc(8px * 0.85);
  }

  .bias-hero__share {
    max-width: calc(100% - (var(--space-gutter) * 2));
  }
  .bias-share {
    white-space: nowrap;
    width: max-content;
    max-width: 100%;
  }

  .bias-body__grid { grid-template-columns: 1fr; }
  .bias-sidebar:not(.is-mobile-nav) {
    position: static;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 24px;
  }
  .bias-sidebar.is-mobile-nav:not(.is-pinned) {
    position: static;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 24px;
  }
  .example-grid { grid-template-columns: 1fr; }
  .related-cards { grid-template-columns: 1fr; }
}

/* utility */
.muted { color: var(--text-muted); }
.serif-it { font-family: var(--font-serif); font-style: italic; font-weight: 400; }
.mono { font-family: var(--font-mono); }

/* ----- Layout utilities (replace inline styles) ----- */
.u-hero-home { padding: clamp(24px, 4vw, 30px) 0 clamp(36px, 6vw, 45px); }
.u-section-problems { padding: 80px 0; }
.u-mt-18 { margin-top: 18px; }
.u-hero-h1-home { width: 100%; max-width: 100%; margin-left: auto; margin-right: auto; }
.u-hero-lede-home { margin-top: clamp(20px, 4vw, 32px); }
.u-section-h2 { margin-top: 18px; font-size: 52px; }
.u-section-p { font-size: 18px; }
.u-problem-title { font-size: 38px; }
.u-problem-cta { font-size: 16px; }
.u-problem-count { font-size: 17px; }
.u-bias-hero-top { margin-top: 28px; }